I am not sure with cars from this period but with the HQ's that came to be finished at the Mosman Park plant.
They were basically complete from the firewall back as in interior trim and all the glass.
The chassis and all the drive line were fitted here as well as all the front panels (which were also painted here they came in primer)
I also have a few pictures showing complete sedans.wagons and utes if you would like me to post them.
Cheers Paul.